Why can't the motor start after getting wet?

[VanRafael]

The motor, also known as the electric machine, needs to be dried if it gets wet. There are many methods for drying, such as using a hot air blower, light bulbs, exposing it to the summer sun, or preferably using an oven. However, the temperature should not be too high, generally maintaining a constant temperature of 60 degrees Celsius is advisable. Additional Information: Classification: Hydraulic Motor: Conventionally refers to an energy conversion device that outputs rotational motion, transforming the hydraulic energy provided by the hydraulic pump into mechanical energy. High-Speed Motor: Gear motors have advantages such as small size, light weight, simple structure, good manufacturability, insensitivity to oil contamination, resistance to impact, and low inertia. Disadvantages include significant torque pulsation, lower efficiency, smaller starting torque (only 60% to 70% of the rated torque), and poor low-speed stability. Vane Motor:

[IsabelLynn]

That time when I drove through a waterlogged section, the engine got flooded and wouldn't start at all—it was really frustrating. The reason might be that water entered the engine, such as getting into the cylinders, preventing air compression and normal ignition. Another possibility is an electrical system short circuit, where rising water levels submerged wiring, sensors, or the ECU, cutting off the current. I didn’t dare to force-start it, fearing engine damage, so I called a tow truck right away. Experience tells me that after water ingress, the first step is to turn off the engine and not move the car, then check the waterline. If the water is shallow, you can wait for the engine to dry before trying again, but deep water requires professional handling. For prevention, observe road conditions more carefully before driving in the rainy season, avoid deep waterlogged areas, and regularly check the vehicle’s sealing to prevent leaks. In short, this is a safety issue—don’t take it lightly.

[DonovanMarie]

When the motor gets flooded and fails to start, I suspect it's due to electrical circuit issues. For example, a blown fuse or a short circuit caused by waterlogged plugs can prevent current from passing through, naturally making it impossible to start. Sometimes, if water reaches the crankcase vent tube, the sensor may report an error, and the ECU system enters protection mode. I recommend first checking the fuse box for any signs of blown fuses; disconnect the battery's negative terminal to avoid further damage. After the water recedes, use a hair dryer to dry out the wiring, then try starting again. However, be cautious: if water has entered the engine's interior, forcing a start could cause irreversible damage, even necessitating a major engine overhaul. For daily car maintenance, remember to check if the engine compartment's sealing rubber has aged, and drive slowly through water to reduce the risk of flooding. Don't underestimate these issues—repairs can be quite costly and time-consuming.

[Mateo]

The engine won't start after water ingress, likely due to internal issues like hydrostatic lock. Water entering the cylinders prevents proper compression of the fuel-air mixture, making combustion impossible to drive the pistons. I've had similar experience before - when water reached half-wheel height, my car stalled completely. In such cases, don't rush to restart. First assess the water level: if minimal, let it sit for hours to evaporate; if significant, tow immediately to check mechanical components like cylinders and piston rings. Daily driving tips: avoid puddles and maintain engine seals regularly to prevent this. For safety, stop immediately when detecting water ingress to minimize damage.

[LeAxel]

My car also experienced a situation where the motor got flooded and couldn't start, mostly due to a circuit short or fuse failure. Water submerged the wiring connectors, relays, or sensors, causing the current to be cut off or lost, preventing the start signal from reaching the motor. It's recommended to first check if the fuse is blown and try replacing it with a new one; disconnect the battery terminal to prevent short circuits. After everything dries out, try starting it again. If it still doesn't work, take it to a repair shop to test the wiring with a multimeter. For prevention, maintain a low speed when wading through water, regularly clean dust and debris from the engine compartment to avoid moisture accumulation. This was a profound lesson; since then, I've been more cautious when driving in the rain, preferring to take a detour rather than take risks.